[1] Indiana Univ Sch Med, Dept Surg, Div Surg Oncol, 545 Barnhill Dr EH 537, Indianapolis, IN 46202 USA
[2] Mem Sloan Kettering Canc Ctr, Dept Surg, Div Head & Neck, 1275 York Ave, New York, NY 10065 USA
[3] Univ Wisconsin, Dept Surg, Sch Med & Publ Hlth, 600 Highland Ave, Madison, WI 53792 USA
[4] Univ Wisconsin, Dept Biostat & Med Informat, Sch Med & Publ Hlth, 600 Highland Ave, Madison, WI 53792 USA
[5] Wisconsin Dept Hlth Serv, 1 West Wilson St, Madison, WI 53703 USA
[6] Dept Vet Affairs Med Ctr, VA Outcomes Grp, White River Jct, VT USA
[7] Dartmouth Inst Hlth Policy & Clin Practice, 1 Med Ctr Dr, Lebanon, NH 03756 USA
[8] Mayo Clin, Div Diabet Endocrinol Metab & Nutr, Dept Med, 200 First St SW, Rochester, MN 55905 USA